Parodied: Bob goes to a camp every summer where the counselers teach the campers how to be evil.
Zig Zagged: Bob is your average villain until he undergoes a Heel Face Turn. He goes to a measure of goodness that rivals that of the The Hero's. In order to defeat the Big Bad, Alice, Bob must perform a Face Heel Turn. Eventually Bob crosses the Moral Event Horizon.
Averted: Bob isn't evil.
Enforced: One of the writers decided to make Bob a villain because there are too many Kid Heroes in the series.
Lampshaded: "No matter what horrible thing I do, I will get away with it! You know why? Cuz I'm still a child and no one ever suspects children! Delicious!!"
Invoked: Alice decides to use a mind control device so that more kids can join her organization of evil children. Bob is one of these who is affected by the device.
Exploited: See Deconstructed.
Defied: Before he was born, Bob's more heroic father Charles did everything in his power to make sure that Bob wouldn't be born evil.
Discussed: ???
Conversed: "There aren't many evil kids in real life." "Yeah, keep telling yourself that, buddy!!"
Reconstructed: Bob crosses the Moral Event Horizon by committing an especially heinous crime. Said crime gets on the news and all of a sudden people know Bob's evil.
Played For Laughs: All of Bob's crimes fall in the territory of Felony Misdemeanor, like, for example, stealing cookies from the cookie jar.
Played For Drama: When the government finds out Bob's evil, they send an entire team to find him, and they have to take Bob away from his parents.